JPH0466446A - Rotary-element assembly and bearing member - Google Patents

Abstract

PURPOSE:To obtain an assembly wherein a man-hour is simplified and a bad influence is hardly exerted by vibration etc., by providing a bearing member having a bearing part and a joining part. CONSTITUTION:At the time of assembling, a central shaft 48 of a rotary member 47 is supported on a bearing part 61 of a bearing member 60. Then a joining part 62 of the bearing member 60 is joined elastically to a frame, so that the bearing member 60 is held securely in the frame. At the time of disassembling, the rotary member 47 is readily removed from the frame by releasing the joint of the joining part 62. Accordingly, the assembling and disassembling of the assembly can be made easily. In this case, the rotary member does not easily come off, because the bearing member 60 is joined elastically to the frame.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotating element assembly and a bearing member, and more particularly to a rotating element assembly having a rotating member supported by a frame and a bearing member supporting the rotating element assembly.

[Conventional technology]

For example, an image forming apparatus such as a copying machine is provided with a plurality of rollers for feeding paper. Each roller is supported within the device by shafts provided at both ends thereof. When each of these rollers is temporarily installed in the device, one of the following methods is used, for example.

(i) A bearing is engaged in the elongated hole formed in the mounting plate, and the shaft is placed in the bearing. Next, attach an E-shaped ring to the shaft end.

(ii) Attach a bearing to the shaft end and fit this bearing into an inclined notch formed in the mounting plate.

[Problem to be solved by the invention]

In the conventional configuration (i), an E-shaped ring must be attached to each shaft to which a roller is attached, so as the number of shafts increases, assembly becomes more complicated. Further, when replacing rollers and the like during maintenance, it is necessary to remove the E-type retaining ring each time and reinstall the E-type retaining ring after maintenance, which makes maintenance work troublesome.

Furthermore, in the conventional structure (11), the shaft end bearing is simply fitted into the notch of the mounting plate, so the shaft and rollers are likely to come off the mounting plate and fall due to vibrations or the like.

SUMMARY OF THE INVENTION An object of the present invention is to provide a rotating element assembly and a bearing member that can be easily handled during assembly and maintenance, and in which rotating members do not easily fall off.

(Means for Solving the Problems) A rotating element assembly according to the present invention includes a frame, a rotating member, and a bearing member.The rotating member is a member rotatable about a central axis. .

The bearing member is a member having a bearing portion that supports the central shaft and a retaining portion that is elastically secured to the frame.

A bearing member according to the present invention is a bearing member for supporting a central axis of a rotating member, and includes a bearing portion that supports the central axis;
The frame includes an engaging portion that elastically engages with the frame.

[Effect]

At the time of assembly, first, the central axis of the rotating member is supported by the bearing portion of the bearing member. Next, the retaining portion of the bearing member is elastically engaged with the frame. Thereby, the bearing member is reliably held on the frame. When disassembling the wooden assembly, the rotating member can be easily removed from the frame by disengaging the retaining portion.

In this way, the assembly can be easily assembled and disassembled. Further, in this case, since the bearing member elastically engages with the frame, the rotating member does not easily fall off.

〔Example〕

FIG. 1 shows an example of a copying machine employing an embodiment of the present invention.

In FIG. 1, a document table 2 is fixed to the upper surface of a copying machine main body 1, and a document holder 3 that can be opened and closed is disposed on the document table 2. As shown in FIG. A bypass tray 4 and a pair of paper feed cassettes 5 and 6 are removably installed on the right side of the copying machine main body 10 in the figure. ? j! A sorter 7 employing an embodiment of the present invention is mounted on the left side of the main body of the copying machine.

Inside the copying machine main body 1, an exposure device 8 for reading a document is provided at the top thereof.

This exposure device 8 is composed of a light source, a mirror, a lens, etc. Further, a photosensitive drum 9 on which an electrostatic latent image is formed is arranged in the center of the copying machine main body 1. Around the photoreceptor drum 9, there are a main charging device lO1 that charges the photoreceptor drum 9 to a predetermined charge, a developing device 11 that develops an electrostatic latent image, a transfer device 12 that transfers a toner image onto paper, and a photoreceptor drum 9. A paper separation device 13 that separates paper from the photoreceptor drum 119 and a cleaning device 14 that removes residual toner from the photoreceptor drum 119 are provided.

Between the bypass tray 4, the paper feed cassettes 5, 6, and the image forming section constituted by the photoreceptor drums 1, 9, and downstream of the image forming section, there are paper transport paths 17 for transporting paper, respectively. and a paper discharge conveyance path 18 are provided. At the end of the paper feed cassette 5.6 on the paper feed conveyance path 17 side, paper feed rollers 16a and 16b are provided that feed the sheets in the paper feed cassette 5.6 one by one toward the paper feed conveyance path 17 side. . Further, between the discharge m conveyance path 18 and the sorter 7, there is a fixing device 20 for fixing the transferred image on the conveyed paper, and a discharge roller for discharging the fixed paper to the sorter 7 side. 19 are arranged.

The sorter 7 includes: an input path 29 for receiving sheets from the output roller 19, and a plurality of (for example, 11 sheets) sheet receivers 30a arranged at intervals in the vertical direction.

30b, and a distribution mechanism 31 disposed between the carry-in path 29 and the paper receivers 30a and 30b. Of the paper receivers 30a and 30b, the non-sort paper receiver 30a is disposed at the upper end, and the sort paper receiver 30b is disposed below it.

As shown in FIG. 2, the distribution mechanism 31 has a pair of large rollers 32 and 33 arranged above and below. A drive source (not shown) can be connected to the lower large roller 33.

A guide belt 34 is passed around the two person-shaped rollers 32 and 33. On the other hand, a plurality of discharge rollers 35 corresponding to each paper receiver 30b are arranged at the base of the sort paper receiver 30b. Each discharge roller 35 is connected to the guide belt 3
It is in pressure contact with the surface of the paper receiver 3Ob side of No.4. This discharge roller 35 is rotatably supported by the case 7a of the sorter 7. Below each discharge roller 35, a third
As shown in the figure, sorting claws 36 are arranged respectively. Each sorting claw 36 is connected to a solenoid mechanism (not shown) that can operate independently. It is possible to switch between a non-sorted position and a non-sorted position. Note that an opening 37 through which the paper passes is formed in the wall surface 7b between the discharge roller 35 and sorting claw 36 of each month and the corresponding paper receiver 30b.

As shown in FIG. 2, a pair of ejection rollers 51 are arranged in an opening 50 for passing the paper, which is arranged above the base of the non-sort paper receiver 30a. A large roller 32 is located between the discharge roller 51 and the carry-in path 29.
A contact roller 52 that contacts the surface via a guide belt 34
and a branching claw 53 for sorting the conveyance direction of the paper. The branching pawl 53 is connected to a solenoid mechanism (not shown), and can be used in both the conveying posture towards the sort paper receiver 30b shown in FIG. 2 and the non-sort paper receiver 30a.
The posture can be switched between a side transport posture (not shown). Note that below the branch claw 53,
A guide plate 54 is provided that extends toward the discharge roller 35 side with a slight gap between the guide belt 34 and the guide belt 34 . Further, a sorting claw corresponding to the lowest discharge roller 35 is not provided, but a fixed guide plate 55 is provided instead.

Next, the portion of the distribution mechanism 31 to which the present invention is applied will be described in detail.

On the inner circumferential side of the guide belt 34, there are a pair of upper and lower guide holders 4 as shown in FIG. 2, and a pair of left and right guide holders 4 as shown in FIG.
0 is placed. This guide holder 40 is a member made of sheet metal. A biasing mechanism 41 is arranged on the back surface of the guide holder 40 (right side in FIG. 2). Force 4fl
Four fl141 are provided at both upper and lower ends and at both left and right ends of each guide holder 40. As shown in Figure 4,
The biasing mechanism 41 is attached to a stay 42 extending in the horizontal direction and having both ends fixed to the case 7a. One end of a stud pin 43 of the biasing mechanism 41 is fixed to the stay 42 . The stand bin 43 projects horizontally from the stay 42 in a perpendicular direction and has a head portion at its tip. Further, the middle part of the stud pin 43 is connected to the guide holder 4.
It is slidably inserted into holes 44 provided on both sides of 0. A coil spring 45 is mounted in a compressed state on the stud pin 43 between the guide holder 40 and the stay 42. The guide holder 40 is always urged toward the discharge roller 35 by the coil spring 45. The guide boulder 40 has a roller housing section 46 having a hole 44 at both ends thereof. A guide roller 47 is arranged within the roller storage section 46 and faces the discharge roller 35 via the guide belt 34 .

At both ends of the central axis 4 of the guide roller 47, bearing members 6o constituting an embodiment of the present invention are provided. This bearing member 6o is made of polyacetal resin, for example, and as shown in FIG. have.

A hole 61a into which the central shaft 48 is inserted is formed in the bearing portion 61. On the other hand, a 0-shaped notch 49 is formed in the roller storage portion 46 . The bearing portion 61 is engaged within this notch 49.

The bearing portion 61 has a pair of mutually parallel flat surfaces 61b on the outer periphery.
The flat surface 61b thereof coincides with both inner surfaces of the notch 49. Further, a flange portion 63 is integrally formed with the bearing portion 61 .

This flange portion 63 is connected to the side wall 46a of the roller storage portion 46.
It is designed so that it can come into contact with the inside (back side in Figure 5).

The engaging portion 62 extends along the side wall 46a of the bearing portion 6. A folded part 62a that is folded back approximately 90 degrees is formed at the tip of the engaging part 62. Folded part 6
A flJf slope 62c is provided at the tip of 2a for smoother engagement of the bearing member 60. On the other hand, holes 6 are provided in the side wall 46a and bottom wall 46b of the roller storage section 46.
4 is formed. The folded portion 62a engages with an end 65 of the side wall 46a inside the JL64. As a result, the flange portion 63 and the engaging portion 62 sandwich the side wall 46a, whereby the bearing member 6o is fixed in the correct position within the notch 49. Note that, in order to facilitate handling, the end portion 65 is formed to slightly protrude from the plane of the side wall 46a.

When assembling the central shaft 48 and the bearing member 6o to the roller storage portion 46, the shaft 48 is first inserted into the TL 61a of the bearing member 6o. Then, the bearing portion 61 of the bearing member 6o is inserted into the notch 49 of the roller storage portion 46. At this time, the folded portion 62a of the engaging portion 62 is elastically deformed,
It elastically engages with the end portion 65 of the roller storage portion 46 . This completes the setting of the shaft 48 and the 1-ra 47. Here, the shaft 4B and roller 47 can be easily installed without using the E-type stopper as in the conventional case, simplifying the assembly. In addition, the bearing member 6 ( ) has the engaging portion 62
Since the bearing member 60 is elastically engaged with the roller accommodating portion 46, the bearing member 60 can be reliably attached, and it is possible to prevent the bearing member 60 from falling off due to vibration or the like. When removing the shaft 48 and roller 47 during maintenance work, etc., the folded part 62
It is only necessary to disengage the end portion 65 of a with a finger. At this time, the tip of the end portion 65 protrudes beyond the p1 wall 46b,
Moreover, since the hole 64 is formed, the finger can be inserted into the folded part 6.
It is easy to get 2a. Therefore, disassembly can be easily performed.

In addition, the above? Since the copying operation of the M copying machine is common, a detailed explanation will be omitted here, but to briefly explain, first, the attitude of the branching claw 63 is switched depending on the non-sort mode or the sort mode. In the non-sort mode, the paper is placed on the paper receiver 3Oa from the carry-in path 29 via the discharge roller 61 and the opening 60. Further, in the case of the sort mode, the sheets are guided by the guide belt 34 and transported, and are carried onto a predetermined sheet receiver 3Ob according to the switching of each sort claw 3G according to the number of sheets to be sorted.

[Other Examples]

(a) The present invention is not limited to application to image forming apparatuses such as copying machines, but is applicable to other types of apparatuses having rotating elements.

(c) In the embodiment described above, the center shaft 48 was rotatably supported by the bearing portion 61, but the application of the present invention is not limited to this. The roller 47 may be rotatably supported by the central shaft 48, and the central shaft 48 may be non-rotatably supported by the bearing portion 61.

〔Effect of the invention〕

The present invention includes a bearing member having a bearing portion and a retaining portion as described above. Therefore, according to the present invention, it is possible to simplify the number of assembly steps and to realize an assembly that is less susceptible to vibrations and the like.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of the joint cross section IQ of a copying machine in which an embodiment of the present invention is adopted, Fig. 2 is a schematic vertical cross-sectional diagram of a soak machine in which an embodiment of the present invention is adopted, and Fig. 3 is one of them. FIG. 4 is a cross-sectional view taken along IV-IV in FIG. 3, and FIG. 5 is an enlarged partial view of an embodiment of the present invention. 4... Roller storage section (frame), 47... Guide roller, 48... Center shaft, 60... Bearing member, 61
... Bearing is part, 62... Engagement part.

Claims (2)

[Claims] (1) A frame, a rotating member rotatable about a central axis, a bearing member having a bearing part that supports the central axis, and an engaging part that elastically engages with the frame. Rotating element assembly. (2) A bearing member for supporting a central axis of a rotating member, the bearing member comprising: a bearing section that supports the central axis; and an engaging section that elastically engages with the frame.